scholarly journals The population structure of the lichen Lobaria pulmonaria in the middle boreal forests depends on the time-since-disturbance

2017 ◽  
Vol 54 ◽  
pp. 83 ◽  
Author(s):  
Roman V. Ignatenko ◽  
Viktoria N. Tarasova
Keyword(s):  
Population Structure ◽  
Boreal Forests ◽  
Lobaria Pulmonaria ◽  
Dead Trees ◽  
Tree Population ◽  
Standing Dead ◽  
Tree Population Structure ◽  
Method Of Evaluation ◽  
Trees And Shrubs ◽  
Substrate Types

The population structure of the lichen Lobaria pulmonaria (L.) Hoffm. was analyzed in the Vodlozersky National Park (Karelia, Russia), for middle boreal forest stands having a time-since-disturbance spanning 80 to 450 years. To estimate the age of the last disturbance, a method of evaluation for the tree population structure was applied. The forest stand communities belonged to a successional series: middle-aged aspen – mixed aspen-spruce – pre-climax spruce – climax (old-growth) spruce forest. All thalli (1055) of L. pulmonaria from all substrate units (165, separately standing or lying trees and shrubs) were described within 7 sample plots of 1 ha. For each thallus, the area (cm2) and the functional-age group were determined. The number of Lobaria thalli per ha, number of substrate units, number of substrate types (living, standing dead and lying dead trees of different species) colonized by L. pulmonaria, as well as number of substrate types on which the lichen had completed its life cycle increased with time-since-disturbance. 

Tree population structure in fragments of different sizes in the Eastern Amazon

2021 ◽  
Author(s):  
Mariana Gomes Oliveira ◽  
Claudionisio Souza Araujo ◽  
Igor Do Vale ◽  
Izildinha Souza Miranda
Keyword(s):  
Population Structure ◽  
Tree Population ◽  
Tree Population Structure

scholarly journals Insect herbivory (Choristoneura fumiferana, Tortricidea) underlies tree population structure (Picea glauca, Pinaceae)

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Geneviève J. Parent ◽  
Isabelle Giguère ◽  
Gaby Germanos ◽  
Mebarek Lamara ◽  
Éric Bauce ◽  
...  
Keyword(s):  
Population Structure ◽  
Picea Glauca ◽  
Choristoneura Fumiferana ◽  
Insect Herbivory ◽  
Tree Population ◽  
Tree Population Structure

Wie viel Totholz braucht der Wald? | Dead wood in managed forests: how much is enough?

2004 ◽  
Vol 155 (2) ◽  
pp. 31-37 ◽  
Author(s):  
Rita Bütler ◽  
Rodolphe Schlaepfer
Keyword(s):  
Boreal Forests ◽  
Dead Wood ◽  
Sustainable Forest Management ◽  
Habitat Preferences ◽  
Bird Species ◽  
Threshold Level ◽  
Bioenergetic Model ◽  
Dead Trees ◽  
Standing Dead ◽  
Standing Dead Trees

Dead wood is of paramount importance for forest biodiversity. For this reason it was adopted as an indicator for sustainable forest management by the Ministerial Conference on the protection of forests in Europe. This paper aims to answer the question of how much dead wood is necessary for the maintenance of biodiversity in sub-alpine spruce forest ecosystems. For this purpose we studied the habitat preferences of the three-toed woodpecker, a bird species that depends heavily on dead trees. Previous ecological studies had already demonstrated that this woodpecker is an indicator of spruce forests with a high degree of naturalness and biodiversity. Our field study in Swiss sub-Alpine spruce and Swedish boreal forests showed that, below a threshold level of about 20 m3 standing dead trees per ha, the probability of finding these woodpeckers drastically decreases. Similar results were obtained using a bioenergetic model, which calculated the energy requirements of this insectivorous woodpecker. Based on the results, our recommendation is to ensure a scattering of dead-wood rich areas in forest landscapes. Each area should cover about one square kilometre and have a mean of 5% of standing dead trees (≥ 18 m3 ha–1), and a total of approx. 9% of dead wood(≥ 33 m3 ha–1 standing and fallen).

Sign in / Sign up

Export Citation Format

Share Document